'WSGIRequest' object has no attribute 'objects'

Question

In my Django project, I want to make a simple booking system, that works by clicking a button on the main page that redirects you to view named book_cd. In URL we have cd_name (id) that is converted into var named name in mine view. Problem is that I can't use filter() function to find that one record I want to update because something like this happens:

'WSGIRequest' object has no attribute 'objects'

in line with:

results = CD.objects.filter(CD.info.name == name)

my models:

class CD(models.Model):
    pass


class CDInfo(models.Model):
    cd = models.OneToOneField(CD, on_delete=models.CASCADE, primary_key=True, related_name='info')
    name = models.CharField(max_length=200)


class CDBooking(models.Model):
    cd = models.OneToOneField(CD, on_delete=models.CASCADE, primary_key=True, related_name='booking')
    user = models.CharField(max_length=50)
    when_booked = models.DateTimeField(timezone.now())

my view:

def book_cd(request, CD, cd_name):
name = cd_name

results = CD.objects.filter(CD.info.name == name)

for CD in results:
    CD.booking.user = "test"
    CD.save()

return redirect('index')

I tried with and without request and CD in function arguments, no idea what to do.

Thanks in advance!

EDIT:

full views.py:

from django.http import HttpResponse
from .models import CD
from django.template import loader
from django.shortcuts import render, redirect
from HORSeWebSite.forms import SignUpForm


def index(request):
    template = loader.get_template("HORSeWebSite/index.html")
    list_of_cds = CD.objects.all()
    context = {
        'CDs': list_of_cds

    }
    return HttpResponse(template.render(context, request))


def signup(request):
    if request.method == 'POST':
        form = SignUpForm(request.POST)
        if form.is_valid():
            form.save()
            return redirect('login')
    else:
        form = SignUpForm()
    return render(request, 'registration/signup.html', {'form': form})


def book_cd(CD, cd_name):
    name = cd_name

    results = CD.objects.filter(CD.info.name == name)

    for CD in results:
        CD.booking.user = "a"
        CD.save()

    return redirect('index')

urls.py:

from django.urls import path
from . import views

app_name = "HORSeWebSite"

urlpatterns = [
    path('', views.index, name='index'),
    path('book/<int:cd_name>', views.book_cd, name='cd_name'),
]

Traceback:

Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/HORSeWebSite/book/013

Django Version: 2.0.5
Python Version: 3.6.1
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'HORSeWebSite.apps.HorsewebsiteConfig']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback:

File "C:\Users\eraepkj\PycharmProjects\untitled\venv\lib\site-packages\django\core\handlers\exception.py" in inner
  35.             response = get_response(request)

File "C:\Users\eraepkj\PycharmProjects\untitled\venv\lib\site-packages\django\core\handlers\base.py" in _get_response
  128.                 response = self.process_exception_by_middleware(e, request)

File "C:\Users\eraepkj\PycharmProjects\untitled\venv\lib\site-packages\django\core\handlers\base.py" in _get_response
  126.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

Exception Type: TypeError at /HORSeWebSite/book/013
Exception Value: book_cd() missing 1 required positional argument: 'CD'

Answer 1

change your view code as below

def book_cd(request, cd_name):
  name = cd_name
  results = CD.objects.filter(info__name=cd_name)
  for cd in results:
    cd.booking.user = "a"
    cd.save()
  return redirect('index')

for every function based view first argument must be a request followed by other arguments.